Engraver&#39;s block.



A. MUEHLMATT.

ENGRAVERS BLOCK. APPLIOAIION lILED AUG. 14, 1908.

Patented Feb. 9, 1909.

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f bearing A3.

ADOLPH MUEHLMATT, OF NEWPORT, KENTUCKY.

ENeRAvnRs BLOCK.

Specification of Letters Batent.

Patented Feb. 9, 1909.

Application led August 14, 1908. Serial No. 448,495.

To all whom it may concern:

Be it known that l, ADOLPH MUEHLMATT, a citizen of the United States ofAmerica, andresident of No. 807 Maple avenue, Newport, county ofCampbell, and State of Kenn tuoky, (postpfiice address Fifth and Elmstreets, in the cityof- Cincinnati, county of Hamilton, and State ofOhio have invented an lmprovement in Engravers Blocks; and l do herebydeclare the following to bea full and exact description thereof,reference being had to the accompanying drawings, making part of thisspecification.

My invention relates to engraving blocks, and it has for its objecttheimprovement in the construction of such devices whereby they aresimplified and rendered more eliicient.

The novelty of my invention consists in the combination andsub-combination of the parts as will be hereinafter set forth andspecifically pointed out in the claim.

ln. the drawings: Figure No. l, is a verti-4 cal central section fofmyengraving block. Fig. No. 2 is a plan view of the spiral that operatesthe block to which the jaws M, M2 are attached. Fig. No. 3 is a vplanview of the jaws M, M2 and the head H. Fig. No. l is a plan view of theball bearing.

A represents the base of the device, which base is usuallyhemisphericalso as to be seated upon a sand pad or other holder and is generally made`of cast metal to afford the desired firmness and stability. f `Withinthis base is a brass bushing A2, which is bored out yto receive thespindle B2 of the revolving portion of the block B. The revolvingportion of the block can be retained in a stationary osition with A bymeans of the pin B3. The ower end of the s indle B2, 'rests on a ballThis all bearing is removable so that when desired more friction'willexist between A and B when B is revolved. Projecting up from B is athreaded piece B2 to which the downwardly projecting spindle H2 of thehead H is screwed. The piece E revolves on the spindle H2 and h'as cuton its 'upper face a spiral which works in a corresponding spiral out onthe lower side of the blocks l, l2. By turning the piece E whichrevolves loosely on the spindle H2 the sliding blocks l, l2 can bethrown toward or away from the center of the head H. The sliding blocksl, l2 slide in suitable slide ways, H4 cut in the head H. The jaws M, M2are attached to the sliding blocks l, l2 by fllister head screws l2, T4.The jaws M, M2 can revolve on the screws la, lf* but if desirable thejaws can be held rigid by means of the small screws l5, le. There is ahole K which passes completely through the block which makes it possibleto place such articles as hat pins in a more convenient'position for theengraver to work on them.

The operation of my engraving block is as follows: The work to beoperated upon is placed between the jaws M, M2, the piece E is revolveduntil the jaws firmly grasp the piece of work, when it is ready for theengraver; after the engraving' is completed the piece E is revolved inthe opposite direction and the work removed.

Having described my invention what l claim is.

The combination in an engravers block, of a base, the upper part of theblock revolving on a spindle within the base, jaws operated by a spiralscrew, a vertical hole passing completely through all parts of theblocks, all substantially as described.

Y ADOLPH MUEHLMATT. Attest:

Einw. T. DIXON, J. C. LEMON.

